MEXICO CITY—Texas-born fugitive Edgar Valdez Villarreal, alias “the Barbie,” is the third major suspected drug lord to fall in Mexico in the past 10 months and a coup for President Felipe Calderon in his embattled war on powerful cartels.

Valdez, who got his improbable nickname from his fair complexion, is wanted in the United States for allegedly smuggling tons of cocaine and inside Mexico is blamed for a brutal turf war that has included bodies hung from bridges, decapitations and shootouts as he and a rival fought for control of the divided Beltran Leyva Cartel.

Calderon called Valdez “one of the most-wanted criminals in Mexico and abroad” in a Tweet. He vowed that operations to bring down the rest of his gang will continue following his arrest Monday in Mexico State, an area that borders Mexico City.

The arrest was the culmination of a yearlong intelligence operation, the Public Safety Department said in a statement.

The statement offered no other details, but included a photograph of Valdez sporting stubble as he kneels on the ground, a police officer’s hand on his shoulder.

Valdez was charged in May in U.S. District Court in Atlanta with distributing thousands of pounds of cocaine from Mexico to the eastern U.S. from 2004 to 2006.

U.S. authorities had offered a reward of up to $2 million for information leading to his capture, and the Mexican government offered a similar amount.

There was no word from Mexican authorities on any extradition plans.

Aturo Beltran Leyva

Mexican authorities say Valdez has been battling for control of the Beltran Leyva Cartel since its leader, Arturo Beltran Leyva, was killed in a December shootout with marines in Cuernavaca, a favorite weekend getaway south of the Mexican capital.

The fight against Hector Beltran Leyva — a brother of Arturo — has made a battleground of what was once a relatively peaceful pocket of the country and brought the drug war ever closer to Mexico City. Their fight has spread westward toward the resort city of Acapulco.

The U.S. State Department says Valdez headed a group of assassins for the Beltran Leyva gang. He “is the person most responsible for pushing the battle into central and southern Mexico,” the department says on its website.

Carlos Beltran Leyva

Valdez’s capture is the government’s latest victory against the crumbling Beltran Leyva Cartel. Two other Beltran Leyva brothers have been arrested under President Felipe Calderon, who in 2006 deployed thousands of federal police and soldiers to fight drug traffickers in their strongholds.

Drug-gang violence has surged since the offensive began, claiming an unprecedented 28,000 lives. But the crackdown has brought down several major traffickers.

Aside from the Beltran Leyvas, drug lord Ignacio “Nacho” Coronel was killed in a gunbattle last month when soldiers raided his home in Guadalajara. Coronel was the No. 3 in the Sinaloa cartel, one of the world’s most powerful drug trafficking gangs.

Ignacio "Nacho" Coronel - The "King of Crystal"

Valdez, 37, was born in the border city of Laredo, Texas, and belonged to the Sinaloa cartel until its split from the Beltran Leyvas in 2008 — one of many divisions among Mexican cartels in recent years that have fueled the country’s gruesome gang violence.

Experts said Valdez’s capture could be especially valuable because of the intelligence he might provide on other top traffickers, including Sinaloa chief Joaquin “El Chapo” Guzman, Mexico’s most-wanted drug lord.

“Because they caught La Barbie alive, he will be a very important source of information against El Chapo,” said Raul Benitez, a professor at the National Autonomous University of Mexico who studies the drug trade. “La Barbie was once the bodyguard of El Chapo Guzman.”

Much of the most recent violence in central Mexico has been directed at Valdez’s allies.

The decapitated bodies of four men were hung from a bridge in Cuernavaca last

Joaquin Guzman, El Chapo

week, along with a message threatening allies of “La Barbie” and signed by the gang led by Hector Beltran Leyva. Two more bodies were hung from bridges near Acapulco later in the week, although no gang claimed responsibility.

Benitez said the violence in the region could drop over time, as the government has disrupted Valdez’s crusade to create a new cartel from his split with the Beltran Leyvas. But it won’t initially, he added, because the lieutenants in the gang always fight for control immediately after a big boss is brought down.

And Mexico’s violence overall is not expected to drop because other, more powerful gangs are fighting in the border city of Ciudad Juarez and along the northeastern border with the U.S., where 72 migrants were found massacred last week in what is believed to be the deadliest drug cartel attack to date.

La Barbie’s “arrest will be a public relations coup for the Mexican government, even though it will do little to quell the violence in places like Juarez and Monterrey,” the U.S.-based security think tank Stratfor said in a report.

U.S. prosecutors say they used a federal wiretap of a related case in Atlanta in January 2008 to identify Valdez as the source of thousands of kilograms of cocaine that were imported into the U.S. from 2004 to 2006.

Cartel Beheadings in Baja

Gamaliel Aguirre Tavira

Witnesses said some truckloads traveling from Laredo to Atlanta carried more than 650 pounds of cocaine. The workers sent shipments of money, often containing several million dollars in cash, back to Mexico in tractor-trailer trucks, according to the court records.

Mexican authorities had been closing in on La Barbie’s allies in recent weeks. On July 10, marines raided a house in Acapulco and captured Gamaliel Aguirre Tavira, suspected regional chief of the Valdez faction.